The Tomato Homolog of Coronatine-Insensitive1 Is Required for the Maternal Control of Seed Maturation, Jasmonate-Signaled Defense Responses, and Glandular Trichome Development

Lei Li, Youfu Zhao, Bonnie C. McCaig, Byron A. Wingerd, Jihong Wang, Mark E. Whalon, Eran Pichersky, Gregg A. Howe

Research output: Contribution to journalArticlepeer-review

Abstract

Jasmonic acid (JA) is a fatty acid-derived signaling molecule that regulates a broad range of plant defense responses against herbivores and some microbial pathogens. Molecular genetic studies in Arabidopsis have established that JA also performs a critical role in anther and pollen development but is not essential for other developmental aspects of the plant's life cycle. Here, we describe the phenotypic and molecular characterization of a sterile mutant of tomato (jasmonic acid-insensitive1 [jai1]) that is defective in JA signaling. Although the mutant exhibited reduced pollen viability, sterility was caused by a defect in the maternal control of seed maturation, which was associated with the loss of accumulation of JA-regulated proteinase inhibitor proteins in reproductive tissues. jai1 plants exhibited several defense-related phenotypes, including the inability to express JA-responsive genes, severely compromised resistance to two-spotted spider mites, and abnormal development of glandular trichomes. We demonstrate that these defects are caused by the loss of function of the tomato homolog of CORONATINE-INSENSITIVE1 (COI1), an F-box protein that is required for JA-signaled processes in Arabidopsis. These findings indicate that the JA/COI1 signaling pathway regulates distinct developmental processes in different plants and suggest a role for JA in the promotion of glandular trichome-based defenses.

Original languageEnglish (US)
Pages (from-to)126-143
Number of pages18
JournalPlant Cell
Volume16
Issue number1
DOIs
StatePublished - Jan 2004
Externally publishedYes

ASJC Scopus subject areas

  • Plant Science
  • Cell Biology

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